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F. H. DOEIRR TRANSFER MECHANISM IN ADDING MACHINES 3 Sheets-Sheet 1 Deg,, 2,

Original Filed March 1 1917 580 17. fievvew" Dec. 2, 1924. 1,517,413

- F". H. DOERR TRANSFER MECHANISM IN ADDING MACHINES Original Filed March 16 1917 15 Sheets-Sheet 2 Dec. 2, 1924. 1,517,413 F. H. DOERR TRANSFER MECHANISM IN ADDING MACHINES Original Filed March 16 1917 I5 Sheets-Sheet 3 I I? (l ll ESE-nail!!! iimq i lli! 0 qlel l iii-Bar! v -1111' 0 Illa... 2... III

AYVfi/OP fed/$190 er Patented Dec. 2, 1924.

UNITED STATES PATENT OFFICE.

FRED H. DOERR, OF GRAND RAPIDS, MICHIGAN, ASSIGNO'R, BY MESNE ASSIGNMENTS, TO TODD PROTEC'IUGRAIE COMPANY, INCORPORATED, OF ROCHESTER, NEW YORK,

A CORPORATION OF NEW YORK.

TRANSFER MECHANISM IN ADDING MACHINES.

Original application filed latch 18, 1917, Serial No. 155,251. Divided and this application filed August 28, 1920. Serial No. 406,535.

To all whom it may concern:

Be it knwn that I, FRED H. Donna, a citizen of the United States of America, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Transfer Mechanism in Adding Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to adding machines and particularly to transfer mechanisms in adding machines. The present invention is a division of my pending application Serial Number 155,251, filed Marth'16, 1917, for computing machines. It is a primary object and purpose of this invention to provide a very simple, novel and useful transfer mechanism in adding machines whereby the carrying or transfer from units to tens, tens to hundreds, hundreds to thousands and the like may be accomplished and this in a particularly sure and effective manner without mistake or possibility of mistake. The invention for accomplishing this end as well as many others subsidiary thereto but not specifically enumerated at this time, will appear fully and in detail from thefollowing description taken in connection withthe accompanying drawings, in which,

Fig. 1 is a plan view of the machine.

Fig. 2 is a fragmentary side elevation of one of the units of the machine, parts being broken away and shown in section for greater clearness of disclosure.

Fig. 3 is a vertical section taken from front toward the rear of the machine with parts removed, and illustrating the position of the parts of a computing and transfer unit immediately prior to the transfer operation.

Fig. 1 is a similar view showing the parts pf the arrows associated with the section Like reference characters refer to like parts in the different views of the drawings.

The mechanism which embodies the invention is located above a base 1 and is ,almost entirely enclosed by a casing having a top a, sides and back (not shown), and a front comprising a portion 3 extending from the base about one half of the height of the casing, and which is joined'with the top 2 by a rearwardly turned vertical ledge 4: at the upper end of part3, a' downwardly curved section 5 at the front edge of top 2 and in which a plurality of openings Gare made, and an intermediate curved section 7 in which a plurality of vertical slots 8 are cut andwhich joins the rear part of ledge 4 with section 5 as shown. Section 5 is curved on a relatively short radius of ourvature, and the section 7 on a relatively long radius. Slots 8 and openings 6 lie in substantially parallel planes each slot having a corresponding opening in substantially the same plane.

A shaft 9 lies horizontally back of and below the openings 6, on which a plurality of indicating disks 10 are loosely mounted, one for each opening 6 and positioned so that the indicating figures thereon are adapted to show, one at a time, through as sociated openings. With each disk 10, a. pinion 11 having ten teeth is associated, being connected to and movable with its disk. The figures on each disk run from 0 to 9 and are evenly spaced thereon and in consecutive order. The number of disks, openings 6, and slots 8 is dependent only on, the number of rows or columns of figures that the machine is designed to handle, and may be widely varied in difierent sizes of machines. The shaft 9 is carried at its ends by vertical supporting plates 12 attached to the base 1 and forming with said base, a supporting frame for the mechanism, all of which is practically housed within the outer casing.

An operating quadrant 13 projects through each of the'slots 8 in section 7 of the casing, each of said quadrants being loosely mounted on a hub 14, all of the hubs for all of the quadrants being loosely mounted in alinement on a rod 15 carried by the sides 12 of the supporting frame. It is evident that there is one of the hubs and quadrants for each indicating disk 10. The rod 15 is practically covered by the hubs in alinement, and the hubs at the end are properly spaced from the sides 12 of the frame by suitable spacing collars as shown in Fig. 6. A consecutive series of spaced apart projections 16 are formed at the outer curved edge of each quadrant 13, the finger of the operator being adapted to be placed between any two of the projections; Each quadrant is provided with ten of the projections making nine spaces for the fingers. The quadrants are normally held in upper position as shown in Fig. 1 by springs 17 attached at one end to a downwardly extending arm 18 formed integral with each quadrant, all of thesprings at their front ends having connection to a transverse rod 19 located at the front lower portion of the machine between the side supports 12. The tendency of the springs is to hold the quad r'a'nts in upper position, and if said quadrants are moved away from such osition, they automatically return thereto w en free to do so.

A ratchet wheel 20 is associated with each quadrant, being secured near the same end of the hub 14 on which its quadrant is loosely mounted. Each ratchet wheel is formed with forty teeth. A gear wheel 21 likewise formed with forty teeth is located alongside each ratchet wheel, lying between the ratchet wheel and adjacent quadrant. Each gear wheel is in mesh with a pinion 11 and moves with its associated ratchet wheel. A hook 22 is ivotally mounted on each quadrant and a apted to connect at its free hooked end with the ratchet wheel. In the upper positions of the quadrants, the inclinedundcr sides of the hooks bear against the inclined upper side of a horizontal bar 23 which lies transversely above the ratchet and gear Wheels and in front-of the disks 10, be-

ing held thereagainst by springs 24 which,

when the quadrants are moved downward] act to draw the hooks into engagement with the teeth of associated ratchet wheels as soon as moved sufficiently from the bar, as is evident.

To the left of each operating quadrant of the machine and between the slots 8 in the curved section 7 of the casing, a vertical row of figures, reading upwardly from l'to 9 in consecutive order are printed or otherwise attached, as indicated at in addition a row of figures reading downwardly from O to 8 in consecutive order is placed at the right of the right-hand quadrant, this, however, being of no importance in the pres ent invention. The figures are properly located to correspond with and number the finger spaces in the quadrants between the projections 16.

It is evident that with any indicating disk 10 showing a zero through the openlng 6 in front thereof, operation of the uadrant 13 directly below it in a downward irection the full distance it can travel after the finger of the operator has been engaged in one of the notches therein, will cause the same figure to show through opening 6 as was opposite to the notch engaged by the finger when the quadrant was in upper position. If, previous to such operation some other figure than zero showed through the opening 6, after the operation, said disk shows a figure through its adjacent opening 6 equal to the sum of the figure first shown plus the number opposite the notch in the quadrant engaged by the finger if the sum is less than 10, but if more than nine, the indicating disk will show only the second figure of the sum. In every instance in operating a quadrant, it is moved downwardly until movement is stopped by the engagement of the finger with the ledge 4. 1

Each hub 14 at the end opposite to that at which the ratchet wheel 21 is secured carries a cam member 26. Each cam member is positioned alongside of and closely adjacent to the ratchet wheel on the next hub to the left. Cam member 26 is formed with four cams 27 each bounded by an outer curved cam surface 28 and an inwardly extending side or shoulder 29, asshown, the ends of the sides 28 and 29 coming to points. At one end the cam side or surface 28 is located nearer the hub 14 than at the other and is curved outwardly at a progressively increasing radius of curvature to the point where it meets the shoulder 29, there being deep notches in each cam member, four in number, as shown.

A'dog 30 is positioned substantially vertically back of each cam 26 and bears at its upper end against the edge of the cam member. The dogs are pivotally mounted between their ends on a transverse rod 31 and are held at their upper ends against the cam members by springs 32 attached to the lower ends of the dogs. Each dog at a point above and back of the rod 31 carries a bell crank lever having two arms 33 and 34, the first of which engages with the adjacent ratchet wheel 20 located on the next adjacent unit of the machine to the left when viewed from the front of the machine. A transverse rod 35 extends between sides 12 of the supporting frame back of the disks 10 and a plurality of dogs 36, one for each ratchet wheel, are pivotally mounted thereon. A coiled spring 37 under tension is connected at its upper end to each dog 33 in front the rod 35, and at its lower end to arm oi the bell crank lever ba k of e pivot for said iever the eiiect of i i hold the dog 36 and 33 oi the lever against the rate unit at the left.

wheel being thus supplied exceptthe one at cam member is turned and dog 30 at its upper end is moved relatively over a cam surface 28 passing farther along said surface and moving at its upper portion farther to the rear as the indicating character on the disk 10 comin to opening 6 increases in amount. In ig. 3, the disk 10 is at the positionwhere the Figure 9 shows through the opening 6 in the casing. In big. 4, the one additional step "has been taken such that the zero character appears on the disk 10 through the opening 6, or one has been added to the 9 making 10. .In order for this addition to appear, the one has to be carried onto or transferred to the numeral of the disk of the next adjacent This is accomplished by the engagement of arm 33 of the bell-crank lever mounted on dog 30 with the ratchet wheel 20 of the next unit to the left, it being apparent that as the dog 30 has been turned at its upper portion to the rear with the movement of the cam against which'it bears, arm 33 drops back. one notch on the ratchet wheel and when'the dog 30 moves forward at its upper portion after passing over a point of a cam 27, the upward thrust imparted by said movement to the bell-crank lever automatically efiects a turning of the ratchet wheel of the next unit one step with a consequent turning of gear wheel 21 and pinion 11 with its attached disk one step, thereby increasing the'figure showing on the disk of the next unit to the left by one. The different unitsbeingduplicates, the carrying or transfer operation in all cases to the next higher column is'fthe same, As the pressure of the upper end of dog 30 on the cam surface 28 has a tendency to rotate the cam member 26 in a reverse direction, the dog 36 is supplied to check' the same.

The transfer mechanism describedis very effective and positive in its workings and the operation thereof is simple and automatic. The operation of adding is simple, all that is necessar is for the operator to place the fingers in t e notches of the operating quadrants opposite the figures .of columns 25 in the proper quadrants corresponding to thei units, tens, hundreds, thousands or other columns desired as the case may be, and

move such quadrants down until stopped by engagement of'the fingers against ledge 4. For example, if to any number appearing through openings .6 on the disks it is desired to add any other number, such as 347, the operator places one finger opposite the Figure 3 in the third or hundreds quadrant, another in the notch opposite 4 in the tens quadrant and another in the notch opposite 7 in the units quadrant, operating all until the ledge 4 stops the fingers fromfurther downward movement. The indicating disks 10, after such operation will show the sum through the openings 6. In this connection, it may be noted that the different quadrants] may be operated singly or in unison, either two or more of them. i

The construction of transfer mechanism described has proved its practicability through extensive use and is tactical and serviceable in all respects. 'l he appended claims define the invention and I consider myself entitled to all forms of construction coming within the scope thereof.

I claim:

1. In a transfer mechanism for computing machines, a plurality of computing units rotatably supported in end to end relation and each comprising a toothed wheel and a cam wheel having a plurality of cam surfaces thereon, a pivotally mounted dog for each unit cooperating with said cam surfaces, a s ring urging each dog into engagement wit sa1d cam wheel, said dog and cam wheel surfaces having an arrangement tending to turn said cam wheelina reverse direction, and. a spring actuated lever pivotally carried byeach dog for cooperation with said toothed wheel of the adjacent unit, said lever being arrangedfor movement out of engagement .with said toothed wheel to free the'latter;

2. In a transfer mechanism for-computing machines, a plurality of "computing units rotatably supported in end to end relation and each comprising a toothed wheel and a cam wheel having a plurality of peripheral cam surfaces disposed between equally spaced substantially radial shoulders, a pivotally mounted spring actuated dog for each cam wheel having an end bearing on and actuated by said cam wheel, said dog and cam surfaces having an arrangement tending to rotate said cam wheel in a re- Verse movement, a lever pivoted on each dog between said end. and mounting thereof for cooperation with the toothed wheel df the next adjacent unit, spring'rneans urgin said lever toward said toothed wheel, and

a part on said lever for actuating .the same away from said wheel to free the latter.

In testimony whereof I afiix my'signature.

FRED. H. onne. 

